High-voltage strain-insulator.



L. STEINBBRGER. y HIGH VOLTAGE STRAIN INSULATOR.

APPLICATION FILED MAY 17,1912.

1,054,148, Patented Feb. 25, 1913.

,Mw/lll 'n l i f y i l fg e WTNESSES A l 7%? IIN'VENTOR e, ATTRIHEYv L'LS SEEINBERGER; 0l? .E GKLYN, NEl/'lY YORK. i

- Specification of Letters Eatent.

'GH-VLTAGE STRATlN-INSULATOR.

@riginal application led pril 0;, 1919, Serial No. 553,2l6. Divided and this application led May 17, 1912.

Serial No. 698,009.

To all 'whom it may concern:

Be it known that l, Louis SWINBERGER, residing at Brooklyn, in the county of Kings and State of New York, have invented cer- 'tain new and useful improvements in High- Voltage Strain-Insulators, of which the following is a specification.

This invent-ion relates to strain insulators for high voltage electric conductors, such as that illustrated in my pending application, Serial No. 553,216, tiled April Iith, 1910, ot

` which thisV is a division and is adapted for use in various relations and tor various purposes, such as power transmission,- and for guy wires, or cables employed as stays fior towers, or for poles, masts and other supports, in wireless telegraphy and telephony, as well asin ordinary commercial work.

l seek, among other things, to provide an insulator which is compact and extremely simple in construction, which may be manucal strength. ll. To provide certain internal actured at low cost, and which is capable `of withstanding a considerable mechanical stress and very high voltages, the insulator thus being, as tar as' practicable, proofl against the evils ot leakage, arcing and puncturing.

Among the purposessought to be accomplished` by the aid of my invention are the following; l. 'llo provide an Vinsulator possessing the highest possible form of electric insulation combined with greatest mechani- -means ot such conitormity as to enable one to attach or remove them at will. Vl. To

strengthen thebody ot insulating material by reinforcing the same in the vicinity ofwhere the tension members cross each other,

the reinforcing material thus addedserving ralso the additional purpose ot preventing arcing over from one tension member to the ,then VH. To provide within the body of i insulating material a metallicl member hav- 55.

ing generally the ,form of a semi-ring for gripping against a portion of the insulator nected withthe ends of said semi-ring for exerting thereupon the mechanical strain to which the insulator is subjected. VIH. To Connect the tension members, justmenbody, and tension members detachably'contioned, with a plate engaging-one end of the -.1nsulator .body and provided with an eye for enabling the insulator body to be suspended. Di.. To protect from the weather, a' portion of the insulating member, terminal, conducto;I` or guy, as the case may be, which may be employed'in connection with the insulator. X. To give the various parts such conformity as will tend to prevent leakage, arcing, or puncturing under the inluence of currents of high potential, and to adapt the device torapplication in various relations.

Other objects and aims of the invention, more or less broad than -those-indicated, together with the advantages inherent, will be in part obvious and in part specifically referred to in the course ot the following description of the elements, combinations, ar-

rangements ot parts, and applications ot principles constituting the invention; and the scope of protection contemplated will appear in the claims.

l'n the accompanying drawing, which is to be taken as a part ot this' specification, and in which l have shown a merely illustrative embodiment of the invention: Figure Y.

l is a central, longitudinal, sectional view, through an insulator constructed in accordance with this invention; Fig. 2 is a view similar to that shown in Fig. l, 'but being taken on a plane at right angles to the plane ot Fig. l; Fig. 3 is a transverse, sectional view taken substantially on the plane of line lll-lll of Fig. l: Fig. l is an end, elevational view of the insulator; and Fig.

5 isa detail, perspective View of a hollow metallic semi-ring, employed in the body of v.the insulator, and which i' designate, for

convenience, a-stirrup.

Referring to the drawings by numerals, l indicates the body of the insulator which may be of any suitable material, such as porcelain or Electrose. The body of the insulator has generally theiform of a .solid cylinder formed exteriorly with Aa series of annular corrugations 2.

Extending inwardly from one end of the body portion ll are a pair of spaced parallelly disposed passage-ways 3, which terminate approximately at a point midway between rarement ret. es, rois.'

and said straightened portions are preferably internally threaded and adapted toengage and hold a pair of tension members such asthe bolts 5 whichextend through the passage-ways 3 and have their inner ends threaded into the threaded open ends of the stirrup. The bolts 5 extend through suitable apertures formed in a disk 6, fitting over the end of the body portion of the insulator, and said bolts are formed with substantial heads 7 outside of said disk, whereby said disk is held firmly and securely in position rela tively to the body portion of the insulator. Formed integral'lywith the disk 6 is'an eX- tension 7 comprising an eye 9. The eye 9V obviously is positioned in such manner as to be in the line of greatest stress longitudi nally of the body portion ofthe insulator, that is, midway between the planes of the bolts 5.

axes of the passage-ways 10 is approximatelyat right angles to a plane intersecting the longitudinal axes of the passage ways 3. The inner ends ofthe passage ways 10 may be brought into communication by a stirrup piece similar to that described for connecting the inner ends of the passage ways 3, or the inner ends of passage ways 10 may be connected by a stirrup member, as 11, which has its opposite end portions continued straight throughout the extent .of the passage ways 10 and adapted to receive a separately formed, preferably liexible. tension member as 12, if desired, in which instance the outer or free ends of the tension member 12 will be suitably connected and re- .inforced by a clamp`casting 13 forming an eye 14 for use in the same capacity as is the eye 19. Y The two stirrup portions are arranged so as to link one within the other with a considerable portion of insulating material of the body portion of the insulator interposed between all parts of said stirrup members.

It will be noted that the only stress to which theinsulator is actually subjected is a co.npression stress tending to force the hollows of the two stirrup members toward each other. This structure possesses exceptionally great mechanical strength combined with the highest possible form of electric insulation. l The action of the bolts 5 and the stirrup 4, being rigidly connected together in use, is such as to effectively distribute the mechanical strains applied to the eye 9. The stirrup, also, because of its form as a semiring, and further because of its being hollow and made of thin metal, can undergo slight degrees of distortion and in so doing is caused to fit more neatly lagainst the adjacent portions of the body of the insulator. The strain upon the eye 9 is transferred into a direct straight path on the bolts 5 in the direction of the longitudinal axes thereof and is thus applied with equal force to the opposite ends of the stirrup, and when of sufficient severity or of sudden application', the stirrup gi'ves slightly and this effects such an admirable distribution of strains upon contacting parts of the insulator body as to materially decrease the likelihood of fracture of the insulator.

The bolts 5 are readily detachable from their engagementwith the stirrup, for the purpose of renewing the bolts or the disk which theysecure, as when one of the heads T-is found defective, the eye 9 worn, or for any other reason. l

At the point where the greatest strain is present in the insulator, and because of the increased ldiameter of the stirrup over the lends of the tension bolts, the body port-ion of the insulator is somewhat enlarged as at 15 for strengthening the insulator to resist such strain.

Formed upon the two ends of the body portion 1 are annular flaring collars 16 which serve to shelter the metallic parts contained within them and thereby protecting the 'same from undue exposure to the weather. It will be noted that the outer ends of the collar 16 ext-end fully to the outermost'limits of the lug and clamp'll, so that the innermost portions of the collars are always dry and dry spaces are always present adjacent'the various metallic parts nearest the .body portion of the end of the insulator.

Owing to the novel structure of my strain insulator, it will be observed that for any given zone of insulation body, it provides the greatest possible insulating surface for the prevention of surface leakage and also the tendency to arc and to puncture, thereby producing al very large factor of safety.

These insulators may be used separately or any number of them may be linked or connected together, or connected to insulators of different form, in any preferred manner so as to increase the aggregate in* f sulation for supporting a line, dead ending,

guying or any other relation where currents of very high potential are employed.

riot in a limiting sense.

material.'

ring and extending to the substantially thefform -of Va hollow semil.guage usedl in the following claims is in-' 4r'/'t'ended to cover all of the generic and spe- ,f/cific features -stlrrup embedded permanently therein, .and

nose

As many lchanges could` be made in the above .construction and many apparently vention could be made Without departing from the scope thereof, it is intended'that.v

in the above 'description-or shown in the .accompanying drawing shall be interpreted as illustrative and ffl-llt is also to be understoodjthat the-lanof the invention herein described and all statements of the scope of the invention, which as a matter of-language, .might be said to fall therebetween.l

Having thus described my invention what T claim as new and desire to secure by Letters Patent, is:

' l. A high potential strain insulator, comprising va body of insulating material, a

tension members detachably connected with oppositefends of said stirrup and extending to thesameend of said body of insulating 2 A highpotential strain insulator, comprising a body of insulating material, a. stirrup mounted therein and having generally the form of a semi-ring, and longitudinal tension members detachably connected with opposite ends of said semisame endof said body of insulating materia i 3. -A high potential strain insulator, comprising a body member of insulating material, a stirrup embedded therein and having.

ring provided at its ends with threads, bolts extending straight into'said, body portion and having threads mating said threads of said semi-ring, and an eye `connected with said body member by aid og-,said bolts.

4. A high voltage strain'insulator, com-I prising a body of insulating material, a stirrup embedded thereingif-.ajv plurality of tension members extendin'gfinto said body of insulating lmaterial and. vengaging' 'said stirrup, said tension members being provided with heads, and a plate disposed between said heads and said body of insulating material. y

5. A high voltage insulator, 4comprising a body member of insulating material provided with a plurality of passages `extending thereinto, a stirrup disposed withimsaid body member and partially bounding said passages, and tension members having or-V tions extending into said passages andpsecured to said stirru -l p 16. A high potential straininsulator, comprising a body member of insulating material, provided with straight passages eX- said passages and tio-acting withsaid 'stirrup for supporting said body member.

7. A high voltage insulator, comprising a body member of insulating material provided with a passage extending .thereinto, a resilient 'tubular' stirrup v'disposed Within lsaid body memberl -and partiallyibounding said passage, andy tension mechanism engaging said stlrrup and extending through said passage for supporting. said body member.

8. As an article of manufacture, Va high'v voltage insulator, comprising abody portion of insulating material provided with substantially parallel` "passages `extending into said body portion Q froiri-` opposite ends thereof andlreachingbeyond'the center 'of said body `portion, the'passages from each ,end beingconnectedgwithinsaid body portion 'so'as to form' continuous but 'separate passages located entirely within said body portion, a res'ilientffanchoringmember at the inner end ofonef-of, saidp ssages and a tension member `extendingfth ough said passage, and being connected-with said resilient anchoring member. 'fl

9. A high voltage strain{ insulator, comprising a body member of insulatlng material provided with a passage of substan- .t-ially semi-circularform in general outline, and further provided with a 'pair of straight passages parallel with each ing into said first-mentioned passage, all of saidpassages being disposed completely Within Vsaid body member, and a pair of straight bolts each having a portion extendin through one of said straight passages,

other and mergsaid bolts being lconnected with said-hollow member.

l0. A high voltage insulator comprising a body portion of insulating material lformed with substantially parallel passages extending thereinto from opposite ends, and

reaching'beyond the center of said body portion, the passages from the same end being .connected together within said body portion so as to form a continuous passage having spaced legs located entirely within said body portion, a resilient anchoring member at the inner end of one of said continuous passages,

and a plurality of strain members one in each of the legs of said continuous passage engaging said resilient anchoring member at spaced 4localities thereon.

lin testimony whereof I aiiix my signature in the presence of two witnesses.

y LOUIS STEINBERGER-- Witnesses: i

v F. ,Gusronn HANDRE, NATHALIE THOMPSON. 

